Formulating a Back-up Formal Outfit

[PiperOfThePlains]

Here's my situation:

I have a prom coming up and I am fixing to order a Regulation Doublet + vest/waistcoat. In the unfortunate event that it is not delivered on time, would it be "acceptable" to wear my tweed Argyle jacket, my crossbelt and my belt over the top of my jacket to "formalize" it? This MacLeay portrait has been my reference.
M25 MacPherson 400px_cross-belt-jacket.jpg Note the gentleman on the left.

Of course, I will be sporting a nice shirt, tie, diced hose (and flashes), evening dress sporran, sgian dubh, and buckle brogues.

For those who are curious, I am ordering my Reg. Doublet from Ian Parenteau (of glengarryhats.com). Thoughts?