Keys to 1986 to 2001 - volvo high security 2 track (hi sec 2) blanks. Volvo part 3091508
If you know the code number you can etsy it.. or online store
blanks https://www.ebay.com/itm/393291720901
locksmith in Duluth GA can cut (678) 699-2634, they say they can refer to other local locksmiths if needed. (video)
I think this might be the same key as the volvo s40/s70, but not 100%. So if the locksmith cant cut a VNL780 key, they might be able to do a car s40.
2002 - 2017 volvo part 20719248 - dual sided non-transponder key, can be cut anywhere there are blanks
Ilco blank 1588 (metal head)
Ilco blank 1628 (plastic head)
Volvo Truck Gen2 Key Fob Remote Control Door Lock 21392420