In my order of preference,
1) The Parts Place, most of their parts are up 30% less than the other guys, same day shipping and almost everything in stock. When you call their number a real person answers the telephone.
2) Year One, priced about the same as the other vendors excluding The Parts Place, but they offer discounts up to 15% when shopping on-line. I usually receive their products within 2-4 days, excellent returns policy. It is not uncommon for some of their items to be backordered.
3) Ames Performance, Priced about the same, they do not process orders for several days and I have waited as long as a week to 2 weeks
for parts. They carry many of the hard to find items. It is not uncommon when calling Ames for their number to ring busy for hours. They have the worst on-line order process of all of the vendors.
4) OPGI takes 4 days to a week to process orders and it usually takes 7 to 12 days to receive the parts.
5) I haven't purchased very much for The Paddock or Performance Years, I have purchased a ton of items on
e-bay and have found good deals on hard to find and used items.
Good luck,