For those of you still needing a blower for a 138 / 184 condenser/dichroic head and don't want to "rig" something up, there is a pet dryer/blower I just purchased with an incredible 114 CFM Variable Speed output for roughly $300.

http://www.chrissystems.com/kool-dry...fications.aspx

It can be left on all the time while printing and with the variable speed switch, you can vary the fan speed as needed. It has a dual filter, and it can also do double duty on your pet or your own hair! The only thing you'll have to rig up is the adaptor from the hose to the enlarger head.