Maybe put a towel over the electric kit trigger? It's a difficult situation when you can't practice on the real thing. I have an adjustable kick drum practice pad for my apartment and I keep it really loose to approximate an acoustic head a little better.

I also practice on a Roland set, but I don't find the KD8 to have much rebound.  What type of beater are you using on the Roland set?  The beaters I use are flat faced (Iron Cobra and Puresound). I recently replaced my KD8 with a KD85 mesh head kick. If you think the  KD8 is bouncy... Oh man!  I tune my acoustic kick just past the point where the wrinkle is out of the head. Using a flat beater on the kd8 is close, but the KD8 is fairly solid and has   sort of a "smack" feeling when the beater hits it. I don't know if you can get an acoustic kick to feel that way (or would really want to). I bought the mesh head kick mostly because I thought it might have a more similar feel to an acoustic kick. In my own search to find a way to lessen the rebound (why this topic caught my attention) I read where others have used Mole skin adhesive pads or kick patches made by Evans, Aquarian, etc...
 

one more thought on this...

If you want to obtain a similar rebound on the acoustic BD then consider switching to a thinner batter head.  For example, I like the Aquarian Super Kick heads for my BD batter.  The SKII is a 2-ply head and the SK1 & 3 are 1-ply heads.  If I desire a more responsive foot I might use the 1-ply head... or switch to a SK2 for less rebound (and more 'thud').  The effect is similar to tweaking the tension as you mentioned.

But again, my suggestion is to adapt your skills to handle either.  This will come with time & experience.  I encourage my students to switch stuff around (heads, cymbal placement, kit config, etc.) because it will increase your control.  Over time you will be able to dynamically switch between "heel up" and "heel down" techniques without even thinking about it (that's the "better foot control" aspect).