Consider independent sponsors if your deal is smaller that the $3-5M+ EBITDA floor common to larger PE firms. May also get more customized terms and hands-on help with IS. There's a bunch of us on Searchfunder--reach out to me and others to find your best match of experience and approach.

What aspect of working with a PE firm are you curious about? You'll have to share both sets of financials. They'll propose a combo valuation and structure. Some firms might be ok with having a minority stake but most will want to own majority. Some Qs I'd ask myself if I were in your position - is the acquisition worth losing ownership in the business? Is there a smaller acquisition you can do with debt to retain ownership? Is there meaningful operational support the PE firm could provide that would make giving up some ownership worthwhile?