I posted here a few days ago for feedback ordering from
www.lamps-dlp.com. Unfortunately, no one had any; I guess it is a relatively new site. I ordered from them anyway because they had the lowest price for the bulb I needed and offered free shipping. I was very pleased. I ordered the part on Monday before 4 (if you order before 4 they'll ship it out same day). They emailed me the tracking number and receipt. It was delivered to me by Tuesday at noon, about 24 hours after I ordered it! It was the correct part, original Toshiba with the housing. Installed the bulb and now I can finally watch the digital cable that I pay too much money for.
Although I didn't have to return anything, I did note on their return policy that you have to contact them within a few days of receiving the part and get approval if returning it. Overall, if you know the exact part you need, it is probably the most efficient, least-cost way to go.