I need some spare parts for SEGA. Before the buy i have some questions.
Sorry i am a newbie

1- I need a Video card GIGABYTE GV-N68T256DH for The house of the dead

I haven't find this model on the internet. isn't it same with 6800 GRAPHIC CARD? And if i buy a normal 6800 GRAPHIC CARD on ebay, does it work? or i need a speacial graphic card for SEGA?
2-I need a Video Card G-FORCE 7800 GS AGP for Let's go jungle . Same questions : if i buy a normal 7800 GS AGP on ebay, does it work? or i need a speacial graphic card for SEGA?
3- I need a CF Card (Mini RAM) (it writes "REV E" on the card) for Let's go jungle
on side:

other side:

Game CD has been lost. The CF card doesn't work. What is the meaning REV E? or other number on the other side? How can i solve this problem?
4- Projector color wheel (Toshiba DLP projector, model: PRHD4A) for Sega Out Run 2 SP DLX with two car






and it is hardest to find i think . Any of the Toshiba services don't know this model of projector. Is there any compatible another model ?