RE: Good clutch shoes.
Hi,
I would suggest OFNA ones because it comes with more springs and washers. 2.5mm washers is not easy to find. If you do have other hardware, you can also try Mugen ones. OFNA and Mugen ones are more race oriented.
Try to run a combination of composite shoes (2) + aluminum shoe (1), you can get easier driving and save lots of money on alu shoes and tires.
Regards
Joaquim