Never tried the goalie skates and cannot speak to the sizing. It's possible they did adjust the sizing from the original player skate release.
For me, I wear a 9 Bauer Supreme and I fit an 8 or 8.5 tf9. I can put on the 8.5 without baking, but not the 8. To get the 8 on I had to bake them a bit and take out the tongue. I ended up going with the 8.5 because they're more comfortable, but if I were playing competitively and wanted the extra performance I would go with the 8, even though I couldn't get them on initially. So it's definitely possible that a 7 or 7.5 might fit you, but you might have to heat them a bit to find out