Try www.tigerdirect.com they have an inexpensive unit on their front page. I have dealt with them in the past for parts and supplies for my home-built desktop and had no problems.

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Dave

'05 325xi
'10 E70 35d
'85 911 Carrera
'66 911 Work in progress
'91 Chevy C1500
'95 Jeep Cherokee
‘18 Jeep JLU