Canadian Aero - $2000 OH
https://canadianaeromanufacturing.co...classic-style/
Quality Aircraft - $1495
https://www.qaa.com/products/aircraf...tarter-adapter
Found an outfit in Hamburg Germany that claims to OH them as well.
There may be others but I found these three rather easily.
Best wishes.
PS - There is an old wives tale that says not to run Camguard in Conti's because it will ruin the starter adapter. NO idea if there is any truth to it.