TP + FD - standard line for short stacks (40BB)

This question is mostly difficult because it involves the structure of our home game:

$20NL buyin, typically 7-8 handed, .25/50 blinds. Yes, everyone buys in at 40BB. It sucks, but I'm stuck with it for now.

This is a hypothetical hand, but I've run into it a few times already:

Hero has about $20
Villain also has about $20

Assume villain is a fairly honest player, and usually has some kind of hand when betting.

Hero is dealt: A[img]/images/graemlins/diamond.gif[/img]T[img]/images/graemlins/diamond.gif[/img] in LP
3 limpers, hero limps in

Flop ($3 or so) comes:
A[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/diamond.gif[/img]
EP checks
MP1 bets $3
MP2 folds

Hero ???

At this point, two dimes says hero is about a 45/52 dog to AK, and about 30/70 to a set. I'm ruling out 2 pair.

Normally, I would put in a raise here to something like $10, but with our stack size, that would commit me entirely.

Which option would you go with:

(a) Call and see the turn for cheap? What's the plan when the turn is a non-diamond and the villain leads again for roughly another $5-10 or so?

(b) Just push here, and take advantage of fold equity since I'm about even against any TPGK

Notes on villain: with AK, he would normally call this all-in against people about 60% of the time. Against me, it would probably be much lower because of my tight image at the table.

My thoughts are: villain will most likely only call me with a set, where he would be ahead. Is it worth stealing $6 with the push?

Thanks!