I'm looking for a place to acquire the following spell effects (Vvardenfell, Solstheim, Mournhold, Tamriel Rebuilt, don't care):
*Absorb Health
*Fortify Skill
*Summon Golden Saint
*Summon Winged Twilight

The first two I want for spellmaking and the last three I want for enchanting, so I don't really care about the quality of the spell. If it makes a difference, I'm a low-ranking member of the Temple (haven't done the Seven Graces yet), an Evoker in the Mages Guild, an Oathman in House Hlaalu, and a Captain in the Thieves Guild.

Everything you need to know:

http://www.uesp.net/wiki/Morrowind:Spell_Merchants
http://www.uesp.net/wiki/Morrowind:Mysticism_Spells#Absorb_Health

Thanks, I didn't know the UESP had a place to find who sold specific spells.