Here is a price breakdown of what these bits cost, figured I'd take a minute to scribble it down for anyone else going down this road. I am in Ontario, Canada as I'm sure prices differ regionally.
From local Subaru dealer-
The two seals I questioned about above total $18.
Thermostat 78deg $26.20
Oil pan $66.08
V-belt $21.58 (mitsubishi)
a/c belt $27.90 (gates)
rear main seal $16.66
water pump gasket $3.40
oil seperator plate $21.79
bolts for sep plate $0.39/ea
Gates timing belt kit TCKWP304 with waterpump $172 USD + exchange + import + shipping + tax = $221.64 CND
from local auto parts shop (+tax)
Valve cover gasket kit $50.36 (with spark plug seals and 10 bolt grommets)
Fel-pro intake manifold gasket set $12.54
Knock sensor $132.55
Front main seal $18.71
PCV valve $4.93
don't forget plugs, wires, oil, filter, coolant, engine cleaner, sand paper, anaerobic sealant, rtv sealant.... prices vary by quality.
I'm still under "budget" (had a dollar figure in mind to get this car rolling) but certainly costing me a little bit more than expected. reassembly beginning today