sprint htc touch pro 2 cracked screen, how or where to repair

[jacs xcx]

Hi, could use some advice
bought a sprint htc touch pro 2 on ebay,
got it working on boost mobile, ($50. everything plan, learned about it here)
anyway had for two months, and i dropped it and now the screen is cracked,
Question: where can i buy a replacement screen, and/or where can i get the phone repaired.
i don't think i can send it to sprint for repairs, since i am using it on boost mobile.
any suggestion would be appreciated.
thanks in advance.:

update:
walked into a sprint store, showed the rep my phone with the cracked screen and ask if they could repair it. He took back into the lab, came back and said they would repair it or replace it for $125. I said fine. He asked for my sprint number and i told him i was actually a boost mobile customer. He said he was sorry but the repair service was only for sprint customers. I've learned that i would be a waste of my time to argue with him so I thanked him and left for another sprint store. Did the same thing. The rep opened the phone, removed the battery, scanned the upc code, and told me that it would cost $125. He took the phone into the lab, came back out later and said that they would have to replace the phone and i would have to pre-pay for the replacement phone. I paid the $125., he placed the order and two days later I got a text that the phone was in. I went in, told the rep that i would set up the phone by myself, she said that she would have to set it up for me. while doing this, i am sure that she noticed that i was actually with boost mobile. She did all the settings, and did everything except activate the phone. She explained that she got a message that said i should call my rep for assistance. I thanked her, left with the replacement phone, it looked brand new. Called boost mobile, luckily got someone who knew what she was doing. In about 5 minutes, my new TP2 was activated and working again.
It is just luck or karma. It could have gone bad at the sprint store or with the boost mobile rep.