Hello all. It's been a while since ive done any LF but i am planning to get back into it now that it is cooler.

I am looking for a small lens for the long end of my Shen-Hao HCX-iia.
It just barely extends to 360mm so I was hoping for a 300mm or something slightly shorter like 270mm.
It seems like most of these are made for 8x10 cameras so they are big. I cannot find much info for small, light lenses in this range.
What do you suggest?