Re: Swapping magnets... where to buy?
Yes, we swap magnets on existing PU's, much easier and cheaper than winding a PU from scratch ourselves. Start with a good American or European PU and decide if you need to move the EQ in another direction (don't waste your time tweaking Asian PU's, which are muddy-sounding to begin with). If your PU is in the ballpark ohm-wise, a lot of times this will give you the tone you want. Doesn't always give a better tone, but it's much better to spend $5 on a magnet than $100 on a PU. You never know how a PU will sound in your particular piece of wood, and magnets are a life-saver if you're not independently wealthy.
Check old threads on this forum for discussions & instructions. Search for A4 or A3 and you should find plenty of stuff. Takes 10-15 minutes to swap a magnet, and half of that is de-tuning & re-tuning (don't cut your strings).
Wymore gives free shipping on $50 orders, so maybe you should get a variety, a few of each, so you don't have to wait for another one to arrive & pay shipping again.
Ask questions, we'll help you out.