For the Tradition Ports the neoprene gasket is: Goi PT-G8

"Gasket for Small Goiot Original Hatches, per ft.: Goi PT-G8: BuyBlack Neoprene Gasket is used on the Goiot Original Small Hatches (#114 and #115), and all Tradition Ports, Except the Largest Goi PT54.32. Round profile Gasket is 8mm (5/16") OD, and is sold by the foot.  R8"

The small hatches use: Goi HT-GS

"Gasket for Small Goiot Tradition Hatches, per ft.: Goi HT-GS: BuyBlack Neoprene Gasket is used on all Goiot Tradition Cast Hatches (including Tradition Escape and Sliding Hatches), except for the Two-way opening, and the Largest (835mm (32 7/8") square glass size) Cast Hatch. Trapezoidal profile Gasket has 14mm wide Base, is 12mm wide at the top x 10mm high, and is sold by the foot."

The large hatches use: Goi HT-GL 

"Gasket for Large Goiot Tradition & Original Hatches, per ft.: Goi HT-GL: BuyBlack Neoprene Gasket is used on the Goiot Two-way opening, and the Largest Tradition Hatch, Goi HT80.80 (835mm (32 7/8") square glass size), as well as Larger Goiot Original Hatches. Round profile Gasket is 10mm (3/8") OD, and is sold by the foot.  R10"

I had ordered and installed the handles and catch blocks on the previous SV Will Sea work trip. However, catch blocks are sold individually instead of in pairs. 

I just placed an order for the final catch block I need to properly close the main salon hatch. It's part number Goi HT-HSC on this page