Cardiff girl --
Gorgeous suit and it looks just back from the tailor!
Since it's just a bit snug in the waist, have you thought about having it altered? There may even be seam allowance (as with most men's wear, grrr) given that it was a high-end piece. If not a little snip for an extension shouldn't be an issue...a friend's mom has that done on all her pants.
I'm glad you still wear the jacket but want you to have the whole deal...AND a meal.
ps I definitely have a few oldies but goodies. One being an ~ 18 y.o. silk bias-cut dress that outlasted the wedding for which I bought it!