I can help with the 500 hardware... you pay shipping, no charge for the hardware
One condition... when you are done you can't sell it you have to give it to someone that is looking to learn
I know I have a A4 rack, I think I have some 5/02 CPU's, you will need a 1747-UIC or 1747-PIC, I know I have a few I/O's but not sure what they are I think a 1746-OW16 so this will work for your output, I will look tomorrow when I go the the shop, I don't think I have any power supplies
If you are interested I will get it together, should be about 50 USD to ship and takes about a week
For the 5000 hardware you will need to buy it, I would look on eBay I have a lot but I had to buy it, the 500 stuff is from old jobs that I removed