I'm one of the folks that really like these Dynamics. The square you have is one I've not seen. I'd like to see some more pictures.
You have the most important part of the band, those buckles. Look on eBay for some straps, they will be aftermarket and not very expensive but they'll work. Don't bother with the Omega Boutiques as
@Vitezi mentioned. Also be very firm about no polish. The brushed finish is the best part.
Here are 3 of mine:
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