Source of heavier duty seat springs?

[Dripfedfloor]

I have to face up to being too heavy for the seat springs on more than one pre-war bike. Anyone know if heavier duty versions are available?

[militaryron]

Do you mean the coil springs or the mattress springs? Ron

[Dripfedfloor]

It's the main coil springs.

[militaryron]

If you speak to Graham at Alberta springs and send him one of your originals, I'm sure he can make some of a bigger diam wire. https://www.yell.com/biz/alberta-springs-colchester-1722563/

Ron