Up-Date (If anyone cares)
I research the recommendation (DISCOUNT TV LAMPS on ebay) from member Sepen. The listing on ebay was for a OSRAM lamp.
The listing also stated
"Philips and OSRAM are two completely different lamps with different performance characteristics and quality."
"The ORIGINAL replacement lamp for this television is made by PHILIPS."
"We recommend purchasing the PHILIPS replacement lamp as it WILL GIVE YOU BETTER picture quality and will last much longer (2-3 Years)."
So I placed a phone call, and I found out that they have a sister store (Discount-Merchant) where they sell the Philips lamp. So that is where I purchased the lamp.
www.discount-merchant.com
The customer service rep (Edward) was patient with my questions, and helpful. I even received a little discount, and free shipping.
http://www.discount-merchant.com/ProductDetails.asp?ProductCode=Mitsubishi-915P027010-Lamp
In the end I don't know if I was up-sold, or not--Philips vs. OSRAM. But I'm happy.
Who is coming to install the lamp?