Hi Kuby,
Any type of firm flat and non flexing support surface would generally be fine although I would make sure that there wasn’t more than about 5" gaps in between any slats in a foundation or support surface under the mattress (and less would be better).
While I don’t have any specific suggestions … some of the options that are listed in the foundation post here should be helpful.
Congratulations on your new mattress as well … you certainly made a great quality/value choice 
Phoenix