Cost Factor for odd Armor

[clnoel]

Background: I run my GURPS campaign in the D&D world of Eberron. One of my players is building a new NPC as a "Syberis kobold", which is a kobold race with wings that lives on tall mountaintops.

I've built out all the stats, no problem. My question is: How much should armor cost for this race? I haven't been able to find generic rules for armoring odd body shapes, unless they are so odd you can effectively go for horse barding instead.

Assuming that he doesn't armor his wings, should his torso armor cost more because it has to have holes in the back for his wings? Should his leg armor cost more because kobolds are toe-walkers? Or should these be accounted for by assuming that the armor you start with is "fitted" for you (Low-Tech p.103)?

What if he finds some great armor somewhere down the line, and wants to have it refitted for him? Is that still accounted for by a craftsman spending an hour and making the Armory+2 check (again, Low-Tech p.103), or should it cost more because it takes longer or is a more difficult check?