Whifbitz 3" 1st decat to 2nd cat gasket

Just purchased the decat off a member on here, for my na. Will be going into local garage to be fitted as ive read the problems you can get from trying to remove the old 1st cat. Just wondering which gasket to use between 1st decat and 2nd cat. I did email Whifbitz but not had a reply yet. Ive done a few searches and understand the manifold to 1st decat is just an exhaust paste seal/loctite 5920, as the flanges are flat to the manifold here. Just not sure what gasket I need to connect to the flat surface of the 1st decat to 2nd cat. Also can I use existing bolts to connect this or do I need to get some. Don't want to take it to get fitted and find that I don't have everything I need. Wasn't going to decat but I have a leak somewhere on my first cat and seems like decatting is a better option than having a garage remove it then charge me allsorts to weld up and keep the Supra in :-(. Thanks for any help.

Will this do the job?

http://www.ebay.co.uk/itm/Supra-Exhaust-Gasket-2-Bolt-Hole-Gaskets-3-76-2mm-/290581125248?pt=LH_DefaultDomain_3&hash=item43a7fc1880

I use these for in-between 2nd and 1st cats/decats... EBay item number 320764460277 with some loctite 5920.

Will have a look thanks

Just to check is that ebay item Ford Galaxy Crush Ring Gasket

Inner Diameter

Approx 83mm

Outer Diameter

Approx 72mm

Will this go between a whifbitz 1st decat to 2nd cat ok?