Got a laugh from me, but I did mean only the 'a', not the 'ar'. I couldn't think of any other English word with that sound unfortunately, do you have a better suggestion?
Unfortunately I can't seem to get it to work for any sound with my hodgepodge of an English accent. Perhaps it could work with a very thick cockney accent, but the length of the vowel would be quite different between the two,
RP might use a similar vowel, but even most modern British people don't seem to pronounce these very similarly based on this pronouncing dictionary's advice and sample clips. And I can confirm as an Australian that Australian English accents don't pronounce them remotely similarly.