You can buy a syringe here with an open end, but you cannot get the fine needle or anything that is related to it here in NYS. Too much regulation.
As for pumps and tubing, I have been round and round about this. One company got me tubing and swore it would work. Then they tested it with a 5 or 7 channel peristaltic pump and found the tubing would not work, so they reordered for me. This has been a real problem.