I can't recall where I got this list from, but will try and locate the link.

VW Thing brake parts that are labeled as "VW Thing" parts can be very expensive. This list maps regular VW Bug part numbers to components on the VW Thing.

- Front backing plate is Thing only (181-609-139) Because of the lower ball joint difference, Bug can work but may rub.
- Front shoes - Std Bug '65-'77 (113-609-237C)
- Front drums - Bug '65-'67 (131-405-615A)
- Rear backing plate - ALL Bug '68-'79 (113-609-439E)
- Rear shoes - ALL Bug '68-'79 (113-609-537C)
- Rear drum - Thing only (181-501-615)
- Rear wheel cylinder - ALL Bug '68-'79 (113-611-053 B)
- Front wheel cylinder - Std Bug '65-'77 (131-611-057)
- Front wheel seal - ALL Bug late '68-'79 (111-405-641 C)
- Front inner wheel bearing - ALL Bug late '68-'79 (311-405-625 B)
- Thrust washer (@ front outer bearing) - ALL Bug '66-'79 (311-405-661)
- Axle nut left (left-hand threaded) - ALL Bug '66-'79 (131-405-669)
- Axle nut right - ALL Bug '66-'79 (131-405-670)
- Front outer bearing - ALL Bug '66-'79 (311-405-645)
- Rear wheel seal (inner AND outer) - ALL bug'69-'79 (113-501-315 H)
- Rear outer roller bearing - ALL Bug '69-'79 (113-501-277 A)
- Rear inner ball bearing - ALL Bug '69-'79 (113-501-283)
- Front brake hardware (Spring) kit - Std Bug '65-'77 (113-698-001 B)
- Rear brake hardware (Spring) kit - ALL Bug '65-'79 (113-698-003 B)
- Front brake hose (440mm) - Bug '65-'66 (211-611-701)
- Rear brake hose (235mm) - ALL Bug '69-'79 (113-611-775 E)
- Brake line kit (ALL metal lines) - STD Bug '68-'77 (113-698-700 B)
- Fluid reservoir - ALL Bug '68-'79 (113-611-301 L)
- Reservoir cap - ALL Bug '68-'79 (113-611-351)
- Master cylinder - Bug '67-'77 (113-611-015 BD)
- Brake light switches (three prong) - ALL Bug '67-'79 (113-945-515 G)
- Brake line T (At rear left) - ALL Bug '50-'79 (803-611-755)
- Clip, Brake Line to Bracket/Hose (4 per car) - ALL Bug '50-'79 (113-611-715 A)
- Grommet, Brake Line (4 Req, 2 at each bulkhead) - ALL bug '50-'79 (211-611-751)
- Star adjusting nut (2 per wheel) - ALL Bug '58-'79 (113-609-205 A)
- Adjustment screw (2 per wheel) - All Bug '68-'79 (131-609-209)
- Parking brake lever, Left - ALL Bug '58-'79 (113-609-613 A)
- Parking brake lever, right - ALL Bug '58-'79 (113-609-614 A)
- Parking brake lever pin, - ALL Bug '50-'79 (211-609-601 B)
- Clip @ parking lever pin, - ALL Bug '50-'79 (211-609-619)
- Parking brake cable bracket, left - ALL Bug '50-'79 (113-609-637)
- Parking brake cable bracket, right - ALL Bug '50-'79 (113-609-638)
- Backing plate plug (4 per wheel) - ALL Bug late '67-'79 (113-609-163)
- Lug bolt (12mm - 5 per wheel) - Bug '45-early '67 (111-601-139)
- Dust cap left (W hole) - ALL Bug '66-'79 (111-405-691 B)
- Dust cap right - ALL Bug '66-'79 (111-405-692 B)
- Parking brake cable (left OR right) - ALL Bug '73-'79 (133-609-721)
- Parking brake lever w ratchet - ALL Bug '68-'79 (111-711-305 A)
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--- The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair.
- Douglas Adams -