450 gram snake means 45-67.5 gram prey is the ballpark to shoot for for you. The small you have fits in nicely to that range(in a pinch 2 smaller items of the same approx total weight is good too). The increase in size will most likely be appreciated by your snake.
Good luck.
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And, with all due respect anyone telling people to overfeed snakes is just plain wrong. If you feed smaller meals every 3 days sure, you can do it but, why would you?
More small prey items and more frequent feedings will just cost you more in the long run. It doesn't seem to provide any benefit to the animals and, it is easier to over-feed and end up with an obese animal.
There is no such thing as being healthy and overweight for people so, it wouldn't be wise to assume it is any different with other species without scientific evidence to back it up. I do know that some species of snakes develop liver issues if overfed.
Trying different things is all well and good but, power-feeding has been tried and there are reasons why it is not recommended. If you don't mind spending more to get your snakes the same nutrition and spend way more time feeding them(what may have to be prey that is in reality too small for the animal to adequately stretch ligaments and help with proper skull/jaw/soft-tissue development), I suppose you could. You just won't be doing yourself or your snake any favours.