This year I was helping my friend Matt Lin from SEQLite to make the translation with buyers from overseas. His company is specialized in aluminum cassettes which differ from Shimano Spec. 11-40t.
SEQLite is making 11-42t spec. to a niche market.
We have lots of supplier info in hand, if you need us the combine shipment and make QC spec. as your request.
Here is an article about this product on BikeRumor.com
TPE15: SEQLITE MACHINES LIGHTWEIGHT STEEL, ALLOY AND TITANIUM CASSETTES FOR ALL
Contact us to make your purchase job much easier.