Think I found a replacement that should work. There are 16 bulbs on each pcb board and 5 wires / traces on the PCB. Each bulb connects to the 24v supply on one lead. So then there's 4 bulbs per each of the remaining wires, wired in parallel.
Getting some 24v 50ma micro bulbs from here:
http://www.bulbtronics.com/Search-The-Warehouse/ProductDetail.aspx?sid=0011697&pid=MI2176The diameter matches almost exactly, the length is I think a little longer.. but considering they're 50ma and I also saw very small bulbs for doll houses rated at 40ma I think I'll be safe from a current perspective. I think upon further inspection all of the bulbs had broken filaments. At first I was like, how can these be wired in parallel and not be lighting some of the bulbs, but i checked with a multimeter and looked very close at them and each ones filament was not connected.
Hopefully this works.. prob be cheaper if I could have found a strand of Christmas lights with them in it, but at least I'll know the bulb is good for 24v and $0.26 ea isn't a bad price =)