I'll add a + (or whatever number
) for Automation Direct. They are offering free 2-day shipping if your order is >$50. Here is their selection:
http://www.automationdirect.com/adc/...ders_(A-Series)
And here is one option for what you need specifically:
http://www.automationdirect.com/adc/..._Bore/A12060SP
There are a couple of mounting options to look into too.