Thank you for the offer - the cone needed is a 2 3/4" for an Omega D2-XL. I am still waffling on if I want to spend the money - albeit only ~$20 - on an enlarger I don't own. If I decide to, I'll let you know. The head of the craft center has a call out to the local photography stores to see if they have equipment they'd be willing to donate, so I guess I'm just hoping that works out.
As it is, I found a 75mm enlarger lens in my rats nest of squirreled away darkroom supplies and plan to make a 6x6 negative carrier out of mat board for my Bronica. The darkroom has tons of Beseler 23C's, only one or two Omegas. I will probably, at least for now, stick with contact printing 4x5 negatives. I shoot more 35mm and 6x6 anyway.