You could always try calling a couple regional HR departments, explain the situation and ask them if worth the effort to build more time in hopes of getting hired, but if you're lucky enough to actually get ahold of somebody, you will probably just get a canned indirect i want to get off the phone answer.
Most regionals are going to take the applicant without the DUI over you. However, there seems to be less and less qualified pilots available to the regionals so if it comes down to it, they will hire you vs cancelling flights. Unfortunately your DUI is fairly recent, after 10 years it won't even be a factor at all. HR is mainly looking for a significant amount of time to have passed without another incident to make sure it was a one time incident and you aren't a habitual offender.
Your only option is to move forward, you have invested to much money into aviation not too. Just get your CFI, instruct and keep applying and updating your resume and online apps as you build time and hope for the best.