PayPal sounds good. As far as the couplers, I do happen to have a couple from my intake kit I did. They are 3" straight through. If the tubing for the intake is all 3", then you will only need 3" couplers. If not, you will need reducer couplers. You could them from AutoPart stores, granted they have the size you need. These couplers are not cheap anywhere. The ones at Advance Auto, etc are decent, but not very good quality in my opinion. These I have are better quality. I can let you have two of them (3", black with the clamps(4 total)) for $15 on top of it all.
If so, go ahead and send $47 via PayPal for the housing and two couplers with clamps.