There is no issue at all going to the immigration office in Pattaya where you live, getting the hand out listing the requirements of the 90 day Non-O visa (that's all that's sold inside the country), applying for it for 2000baht, waiting the 2 week under consideration period, going back getting the Non-O visa and new 90 day stamp inked in.
I tried to obtain an in country Non-o at Ratchaburi and was denied. He just kept saying that I must have an exit stamp. So as they say, some offices will, some won't.
yes so I'm better off getting my 1 year extension then leaving and getting my reentry on it. Unfortunately circumstances will probably not allow me time to get my 1 yr extension. Will have to purchase another e-visa while I am away online.
It's a Evisa single entry which you can extend for 12 mths. But a typo in the process meant I didn't get it and I can't get another one before my flight home.