You might be able to find something on one of these sites...

http://www.flextekrc.com/index.shtml
http://www.beatyourtruck.com/prodreview-TOC.html (lots of info on titanium parts)
http://www.lunsfordracing.com/new_products.htm

The Raptor is a fairly new truck, and there are relatively few of them compared to Savages, T-Maxx's etc. Finding titanium parts especially for that truck might be difficult as the manufacturers of titanium and other hop-up parts only support the most popular models. The best idea would be to measure the parts that you need, get the specification (length, thread type etc, etc) and then try to match it to parts that are availible for other vehicles. The Savage in particular would be a good place to start as it is features a similar TVP chassis, and therefore many of the parts will be similar in some respects, look for titanium savage parts and compare the specs to see if you can mod them to your truck.