Just buy any old road tyre and lob it on.
Want a matching pair? Buy any old matching pair and lob them on.
Going away on holiday on 11 June? Don't leave it until the end of May, with it's late May bank holiday, to start looking for road tyres for the awesome steed.... You have had several months to arrive at this point, I guess?
Imagine what you would have done en-vacance, had you encountered the puncture from hell and Monsieur Le Pneu had not got a matching one. Would you have stayed forever, marooned miles from home?
Above all, don't bleat, moan, complain and bitch like a schoolgirl.... Unless you are short and / or ginger; in which case life really has dealt you a duff hand.