I have access to several because of connections to photography.
I really like the Manfrotto, but it is probably overkill for what you are looking for. Well, maybe not. Look at their consumer grade products.
Shop at www.bhphotovideo.com
, but try to look locally before you buy.
Interesting enough the tripod I use most was made in the late 1970. It is good for small cameras, my spotting scope, but not heavy enough for the big cameras.
I would suggest you stay away from the desktop Manfrotto and the monopods which opens up with 3 small legs. These do not work with spotting scope weights.