Hello and welcome to the forum!
Well, the options are innumerable - in 2011 I bought an iPad 2 w/ an Apple BT KB (a little longer than you desire but the same one that came w/ our iMac) w/ a nice cloth protective case, along w/ the plastic folding stand shown below - now I've always used Apple's 'smart covers' which can be folded into a triangular stand - so 'on the road' I will take all unless I also take my MBAir laptop - now on an iPad Air 2 and still works fine.
I would suggest googling 'iPad bluetooth keyboards' (see 2nd screen capture) - plenty of hits - I clicked on the Zagg website and found the one shown in the last pic that likely would serve your needs - but look at the hits, read the reviews, and decide how much you want to pay; also, do a search on
Amazon and read the reviews and Q&A sections for the products of interest. Dave
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