I think I paid approx £18 for the elbow from them, fantastic service, straight pipe is a lot more expensive as I had to buy 1m length.
I have a spare pipe Zars but its from a 1992 car with AMM which might be slightly different at the bottom end as the aero doesn't have the AMM in the way. Should be okay though to copy, you get a fair bit of movement on the flexibles. PM if you want a borrow.
The little filter is the engine breather, I ditched the Saab recirc system, I now have the engine breather fumes going to a oil catch tank I got from Quiller Triumph, nice bit of kit.
under new products, oil catch tank