If you really want to use hooks, I think you will be pushed to find anything strong enough not to bend out, unless cut from solid stock. Also, if it is a working scale model, the chances of the attachments coming off of the hook are probably high. Although I stand to be corrected.
An alternative is to think about would be using eyes. I have used brassed (1/4-3/8") cotter pins as eyes and they are strong enough to take the rigors of sailing rigging for my boat which has an approx 1m hull. I have only used them on masts and booms, but they could be used for blocks, but you would need to try.
The method of fixing I used was to drill a1mm or 1.5mm hole through the wooden component. Then push in the cotter pin, all the way home, secured with epoxy glue. The protruding end of the cotter pin was cut flush afterwards. As the brass oxidises, the end of the pin blends into the wood.
A brass cotter pin might be strong enough to modify as a hook, but if you work it with heat, you may need to temper it again, as it will bend too easily if softened.