Not Pool Related:
I ordered a custom knife in late 2014. The maker told me he would send an invoice when it was ready. A few weeks later and I got the invoice. I paid in full and had the knife within three days.
I ordered another custom knife in late 2014. This time something more elaborate, that would for sure take time. I stayed in contact with the maker the entire time. Within a few months time, I received an invoice and the knife was shipped.
What custom knives did you order? I used to be heavily into custom knives now, just dabble a bit in traditionals these days, but I'm curious who you were ordering from and what you got???
Cuemakers definitely don't seem to work with the same standards the knife guys do. To some degree I can see where it's more complicated, knives just don't take as long from start to finish. Most guys can start a knife and finish it in a few days. They really only have to work on one knife at a time, or at most a small handful. Cuemakers need to have many cues in various stages of build because it just takes so much longer because of the wood.
I don't know enough about custom cues to give any recommendations, but I enjoy reading the ones from others.