Gendirect extended run kit for Champion generators.

SuperGen products
Did have an auxiliary extend run system, using a pump
Comes as a kit, with a manifold block, that goes between the carb and the intake
Nipple on the block supplies the vacuum for the pump

Also has a Tee that is spliced into the fuel line and another nipple to attach the extended tank

Came with everything except the auxiliary tank

Don't know if it's still available

Maybe someone has a link or phone number
I lost both