Actually you should be able to get re-entry permit on any stamp allowing you to stay in Thailand. Even 30 day visa exempt stamp.
I got one few years back when applying one year extension of stay while I was on "under consideration for 30 days".
Applied my extension based on marriage and while waiting the stamp did a trip overseas with re-entry permit and then went to get the extension stamp.
I vaguely remember getting re-entry permit years back when one year non-O multi entry to keep the last 90 days stay stamp after visa expiry alive with few days trip overseas for work.