Idas/nxdn
As far as RF equipment goes, you will need either an Icom or Kenwood digital repeater. Icom has the FR5000 for 2M and FR6000 for 70cm. These have built-in basic controllers that will ID the repeater at 10 minute intervals. An external controller can be added by using the 25 pin accessory connector on the back of the repeater. You will need to AND the 2 logic outputs signalling that the repeater has decoded either the proper CTCSS or RAN code (COS/CAS/whatever in other terms). For IP linking you will need to purchase the UC-FR5000 board to install in each repeater to be linked. As fas as sourcing, I will leave that to you. There are many Icom and Kenwood dealers across the US that would be more than happy to help you out. Good luck!