There was just a couple of discussions about B12 suspension setups over on the B12 page.
I talked to Mossy last year about that setup, doubtful you will find them anywhere. For a direct bolt-on for your car, you'll be kinda limited on choices. for struts, you can get Tokico Blues, and I think you may be able to get Koni inserts, but not 100% sure. As far as springs go, there are Sprint, I think Eibach are still availible, and several Ebay brands availible.
Also you will want to look at getting yourself a set of sway bars from an 87-90 Pulsar SE twin cam model. They are a great upgrade over your stock bars.
I am very happy with my setup and it keeps the car under control even when pushed hard. Good Luck !
