What Are My Options for Applying for a Non-B Visa After My Non-ED Visa Expires in Thailand?

Good morning guys

My situation:

Italian passport

Non-ED visa valid until 10 April (last extension already)

My plan was to apply for Non-B in Malaysia before expiration date but now is impossible.

My Embassy can grant me the letter for the emergency extension but I heard that if you have a Non-ED visa the Immigration office may be cancel it and give you a 30 days of a "not-clear-kind" of visa, maybe an exempt stamp

Now this rumor come to me a couple of time but seems to be impossible to verify accurately.

I ask that because maybe with this 30 days I could apply for a Non-B if it is lika a exempt visa...

Someone have idea what could happen in that case and a possible solution to apply for a Non-B in my case?

Anyway good luck everyone