I live in Austin. My i140 got approved 2 weeks ago and H1B ext was filed in sept 2018. The people in DMV are not so friendly But, I will try to ask them to use A-Number. Also, I am not sure whether they will they send another SAVE request as the last request was sent on Dec 28th 2018.
Thank you very much for your support. I will update here after my visit to DMV.
Update: I went to DMV office and asked for a SAVE request using A-Number but they are unable to submit one as the system is showing them there was already an existing request and which came back as “Lawful status not verified”. The system is not allowing them to submit a new request and they have no idea when it’s going to allow them for placing a new request.