Been search today for Progressive Spring Lowering Kit Part#: 10-1560 and the best price I've found is on ebay.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=35569&item=4510274398&rd=1&ssPageName=WD1V

I believe I've seen these springs go for a lot less. Can anyone give me a headz up on a distributor with lower price on these?

I've seen the White Bros. lowering kit on e-bay for around 75 bucks. I think it was Eastern Performance that had them.

http://www.jirehcycles.com/
they have progressive springs for cheapest I've ever seen. Do a product search for part # 27-155, costs $67.95. I'm pretty sure this is what you're looking for. I have bought from them before, and they are very fast with shipping as well. The parts you order will be ready for shipment within 1/2 hour of ordering. Free shipping on orders over $75.