I imagine Coles would do it.
As an aside, I just won an auction for an older 686 28 gauge (not a 686 Special which was advertised). It was in decent shape but used and the barrels were not original, being different number and a year off in date code. I paid too much but the reason was it had double triggers. What really surprised me was that they weren't marked with an importers mark. The few I have seen listed were smallbores brought in from Europe. It is a 20 size frame, not the baby frame. A set of 30" barrels from an SP3 20/28 combo fit perfectly. It would make a great dove gun with those barrels because they are really weight forward on this frame. The frame and barrels on the one I just bought are much lighter than an equivalent newer gun I own.
I bought the double trigger gun to match the 1932 SO-2 I own. Love double trigger O/U's.