I have a Canadian PR and am applying for a US Tourist Visa from Canada, however my old passport is back home and no courier co: is willing to send the same. Is the old passport with the US tourist Visa (Both expired) required to be shown, as it does state that as part of the requisition.
I can share my experience earlier in the year. I've been working in America for the last 5 years, after my trip to India I landed in Canada as a PR and had scheduled a visa appointment for the USA.
My wife's old passport and visa were expired, my passport with the visa is current but the visa had expired. At the Calgary consulate, they asked for any passports with valid US visas and the current passport. So my wife only had to present her new passport (We had her old passport too, and we asked if they wanted to see that as well but they didn't).
Do note that this was not for a B1/B2 but for a L1 and L2 visa. If you have time for your appointment then I'd recommend writing a letter of Authorization for a friend or family member to bring back your old passport. If you don't have time then you should be able to present them with a photo/scanned copy of all the pages in your expired passport and explain to them why you couldn't get the old passport with you in person.