nice
the primary looks good, definately need a new secondary mirror though (the smaller one)
hard to tell but the focuser looks like its 0.96"
theres a 2" rack and pinion focuser for $20 from here:
https://www.bintelshop.com.au/Product.aspx?ID=6380
obviously its not a top notch focuser but it will be good enough to get you going.
you can get a new secondary mirror from the same place too so for around $60 - 80 the tube will be in working order.