Dave—
it does sound like a Stoboom. The newer in boom furling systems generally are fairly wide open, not using a narrow slot, to help prevent jamming issues that the narrow slot creates.
You can probably use the same sail and just have them add reefing points to it. You'd need to add a gooseneck tack hook or go with a one or two line reefing system. The two line system is better IMHO.
As for lazy jacks. They're fairly easy to install yourself.

I did this on my boat a couple seasons back and you can read about what I did
here.
__________________
Sailingdog
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Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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