Parts is quite hard to find here in finland... the only thing that can be found is used parts, in the -70s these machines where common at peat fields. they were popular because of the extremly cheap price (surprice...).
And the 1970 model is almost the same as the "modern" 1990 model, the only difference is the cab. on older models it was a darn ugly round model, on the "new" model it looks like the one on my machine.
usually i have ordered the parts from Estonia, they are almost free

but you need a lot of parts... and patience to adjust the dry stering clutches and brakes
in this picture it has a perkins engine with 3 speed PS, the original engine seized and i scrapped it and put in the MF engine/tranny.
so now it has 3 speed power shift (F/R) + the reduction gearbox with 5 ranges and the 7 speed+ reverse gear box. imagine going trough every gear

somebody with mathematic talents could try to figure out how many speed options it has