I believe all Toyota parts will be a XXXXX - XXXXX form, so 5 digits hyphen 5 digits.
I was searching for the correct part # for Euro (E-codes) headlights a couple years back & they followed this formula, so I'd expect you would see the same for a USA housing.
EDIT: yep, doublechecked it & they were 81110-60751 & 81110-60571 for German E-code headlight housing & lenses
Also, check the recent few days for a thread about "Fixing a headlight using Karma" - long story short that fella has a new housing & if it's your side of need, he might be willing to sell since he didn't end up using it - JAT
Also, be sure you get the right housing for the generation/year/trim change of 80 you have, I remember there's a difference between the mounting tabs & the fit & finish as it relates to your grill. HTH