Up for sale here is this set of 2 used American Radionic Inc by DuPont mylar vintage wax capacitors.  These are marked .03 uf 200v and test close to that rating.  The ones you get may not test at exactly the values in the pictures, but they should test around .027-.033 uf.  These are really nice caps and would be great in a guitar.  Please see my pictures for details.

US shipping and handling is $4, and international is $12, no matter what quantity you buy.  I accept Paypal.  If you have any questions, please ask.

I have a number of other vintage capacitors, collectibles, Magic cards, and vintage electronics listed--feel free to take a look!