People crossed localities before, it's general boa genetics - some look more like mom and some like dad and some a mix. I remember it was done a few times in the late 90s. There's also still plenty of BI x BC crosses out there (the 'fire' boas, roswell laddertail boas, shoot I know there are more but I cannot recall all the lines now. I believe it was found out the patternless harlequins were a result of BIxBC. There are some lines suspected but the breeder won't admit it but the offspring of their 'new morph!' have that look).

A peru boa tends to be high yellow with thinner saddles and a darker tail. Suri/guyana tend to be pink/purple with bigger peaked saddles and red tail. Why would you want to mix those? What would be the goal? I'd expect to get duller animals with darker tails and less peaks. yuck.

As Sauzo said though, there's no real benefit for it and you generally end up with less desirable offspring as locality is huge in BC market.