Take a look on ebay , someone has the cards for the PC listed right now, just about any version you need, 2 port Imagin 4 port Imagin, 2 port IVM and 4 port IVM
You are also going to need a MIM module on the OCD card.
As far as the 25 pair cables someplace like Graybar electric carries them already made up, there are other places as well and you may even find them on ebay, I need looked for them there, they will probaly run about $1 per foot, you should buy them with a MALE on each end and cut them in half that is the cheapest way, usually a 15 to 20 ft double male cable runs in the $12-$15 range
If you need a gude to what cable pair does what drop me an email
[email protected] with which card you need the info for