weber parts source?

Does anyone know where I can get DCOE parts besides APT?  I'm not against
them I would like to price shop.  I'm guessing I'll find a close market on
pricing.  I will need to change out the chokes E-tubes in my Weber now that
I have my car running.  I'm currently running 26mm in a 40 series and would
like to move it up to 32mm.  Besides the E-tubes everything else looks good
, basing it on what others and what people have posted on the web are using
with a similar setup.

Thanks a bunch,
Charlie