I used a Squier body, no name neck (but decent - nice flamed maple with a good rosewood board. Had to file/smooth the fret ends and level a couple, but simple enough to do. Plenty on eBay), Grover tuners, Gotoh bridge (not high mass), Seymour Duncan regular P p/u (not the high output version and don't bother with the Antiquity, because the spec's are identical to the cheaper regular one), CTS pots, orange drop cap, Switchcraft socket, that 'vintage' cloth wound cable and silver solder (tried to make everything absolutely bog-standard P bass). It worked a treat and cost me les than £250. Oh, and I put a 'Dinky Toys' decal on the headstock (you can get them off eBay). None of that using a Fender one 😊