You’d be looking at fairly low-spec Campag, might stretch to Veloce
In order of most blink first Campag is
Super Record
Record
Chorus
Centaur
Veloce
Mirage
Xenon
(think the last two IIRC are being phased out, Campag can’t seem to compete with Shimano at entry level stuff.
Not an exaqct like for like match to the Shimano groupsets – think of Super Record/Record as Dura Ace, Chorus/Centaur as Ultegra, Veloce as 105. Ish.
SRAM have a smaller range still I think
Red
Rival
Force
Red being their Dura Ace equivalent, again, don’t think either Rival or Force are real ‘entry level’ a la Sora or Tiagra.
Think for 800 quid you’d probably be looking at Tiagra or Veloce. Maybe find a nice last years season model. Campag have ‘upgraded’ Veloce recently so you might find the older style knocking around on bikes with a discount.