hi there,
there are a great range of maps for family history researchers at :
http://www.old-maps.co.uk/maps.html but even when using the 'enhanced zoom' on the 1880 Alness map which has incredible detail, there is no way to tell the numbers on the high street.
i know there is a victorian map of that area on ebay just now, but i don't know if it would have enough detail either. Amazon might be a possibilty but i haven't had a chance yet to look, sorry.
another trip to the library might help, but unfortunately i can't get there now until next month...
websites that might help:
ambaile.org.uk
invergordonarchive.org
scran
or inverness has a really good archive now, i'm not sure if they have a searchable website but i have phoned them in the past and asked if they had specific records and they were very good and even went looking when they weren't sure and phoned me back later.
http://www.highland.gov.uk/leisureandtourism/what-to-see/archives/highlandcouncilarchives/below is a link to an image from ambaile of Alness high street c1910...
http://www.ambaile.org.uk/en/component/image?id=43728&zoom=2sorry i can't do any more at the moment, but let me know how you get on and if you still need anything when i get back, i'll try and get to the library for you then. i'll also let you know if/when your query appears in the rsj.
hope i've been at least a little helpful

kind regards,
Lorna.
p.s feel free to p.m me if you'd rather and i will send you my email address instead of posting publicly...