The other thing you can do is sell your cades to people who rear lambs, and to other local farmers who lamb later than you and need spare lambs for bereaved ewes when they start.
As to scanning for triplets, the two very good scanners I've worked with both say that they'll stand by the geld, single and twin scans but that it's harder to get all the triplets, especially if scanning at a reasonable pace. It's also especially hard if the timing isn't exactly right - too soon or too late makes it harder to identify the individual lambs. So with a big flock, tupped on a tight time frame, the scanner will tell you when they're coming and is likely to get most of the triplets (and all the geld, single and twins correct.) But on a smaller flock, when the scanner is fitting you in around other larger clients, and especially if tupping hasn't been tight, then it is all much more difficult to get the accuracy and to pick out all the triplets.
However, all that said, you have a reasonable size flock by the sound of it, and you also said that your scanner was pleased with what s/he could see, so the timing presumeably was optimal. In which case, I'd discuss it with your scanner and if not satisfied (for instance, s/he may say that s/he needs more time to get all the triplets, so would charge 60p/sheep rather than 55p, or whatever, and you may be happy with that) - but if not happy, then change your scanner.