I could also do it.
Consider:
method- I use the knot method with a doll needle for insertion.
hair match- vintage donor vs new supplier like dollyhair.
length- factory or longer
thickness- thick, thin, med. Don't want to risk breaking the plugs with too much thickness.
glue inside head-yes or no. what kind?
Uh... what else. Tracking and insurance is probably a good idea depending on the $ value of the pony so you will probably want to stick to a domestic user to cut shipping charges.
allergies- I have dogs.