Does anyone sell sectionals which have been enlarged, i.e. are easier to
read? Would make it easier on a few pax who have trouble following along,
even with reading glasses.

I dunno if such a thing would still be called a sectional, as the scales
would then be off...

The following website has sectionals online that you can enlarge and print
but I believe you have to be a member (of which I am) so I don't know
if it will work for you.
http://map.aeroplanner.com

David (KORL)