Howdy;

I could do one better -
iff you happen to have an Eaglemoss AT-RT model (intact);
I'd trade an AT-RT RotS set (replete with stat card, in fair condition) for it.

|If you happened to have an Eaglemoss Dwarf Spider Droid,
I'd trade a Walking Droid Starfighter (bounty hunter's set) for that hehehe.|

So, those are some options at the very least hehe,
of a similar value proposition. If you're interested, be sure to send a BlooMail
I'll be sure to ask around locally and see if any have some 'orphan'/'spare' stat cards for the AT-RT.
I should have some answers in 2 days time or so.

Swinefeld may know if there are any in the lost'n'found/'orphan/spares'?

In the meantime,
I thoroughly recommend to have a look at the VSETs as those are good proxy cards also,
and, a shameless plug,
I've a custom 'revised' AT-RT stat card on the Customs thread -
that could be an option to consider also if finding a spare card becomes difficult - making your own statcards.
Just be sure your opponent is consenting for using non-WotC cards prior to a game hehe

You could by all means also make your own variation of an AT-RT card, based on the original RotS AT-RT card.
So long as the card matches exactly the official card, many leagues or groups even allow IPad etc so as to not have to carry a bulky folder etc

I believe there are also scans of every set available on a couple of archive sites,
so that could also be another option if you have access to a printer and some 140-180GSM card
(I had to go that route for a Darth Sidious miniature; it's a similar color and weight/size and thickness to an actual card.)
Some are even CBYMK print-ready. Lazer printers from a library, or from Officeworks etc, they'd print out a real nice card.

also,
Welcome to Bloomilk,
it's great to see you here.
and hopefully we see you on the customs forum or sharing some games anyhow