You want regulators that go down to low pressure since bike tubing is thin. Most manufacturers make various models. I bought some Harris regulators off ebay brand new for a great price - paid about 1/3 what the shops sell them for. Do some research before biding and you can find a good deal.

As an aside, I'll sell my old Victor Firepower regulators for $20 + shipping. They work fine but I think one of the gauges doesn't go to zero anymore when they are off. You still need to find hoses and a handle.