Beseler 67 Dichro Head

I've got my eye on a Beseler 67 Dichro head enlarger. The fellow is selling it with a 50mm lens and 35mm negative plate...

I need it because I've taken the insane jump (i.e. buying more gear) into medium format and want to do my own printing.

I'm not sure what sort of lens I'd need to print 645 negatives...and where I could get a holder? Can you buy these cheaply someplace?

Thanks!

These items are common on ebay. You will need a 645 negative carrier and a 75 or 80mm lens. The negative carrier can even be constructed from mat board at home.

Parts and negative carriers for this enlarger are still available, although it may take a bit of work to find them. The bigger camera stores often have the negative carriers and lens boards.