Hey man - my sympathy there - I have been in that situation before and its hell.
Can't Dave put u on to his source? If he has retired then he doesn't need it anymore. Also - I bet you weren't Daves only customer, I am sure he could put you on to people in the same situation.
65 weeks for a grow? more like a few months - Just get it going - damn u can even do it outside at this time of year

In the short term you may have to rough it out ...