Not an answer to your question, but have you considered just replacing with led bulbs? I replaced some stock interior bulbs with bayonet led "bulbs" and got to keep the original look with more light output, less energy usage, and very little $$ invested.
Edit: maybe you
were asking about replacement bulbs and not replacing the entire fixture. If so, sorry for the confusion. I most recently bought
THESE bulbs on Amazon and am satisfied with them.