If you are looking for good quality Ti springs, try Spring Time's Kronos Ti springs. Their specs 2.0", 2.5", 2.75", 3.0", 3.5" go well with BOS, Elka, Cane Creek, DSP, Fox, Manitou, Marzocchi, Progressive, X-Fusion, Rock Shox Vivid, etc.
Check out Spring Time's website for online purchase: http://www.springtime.vg/mtb.asp Ship worldwide, fast service.