Looking forward to whatever project you decide upon
If you decide on a charade, let me know if I can be of any help.
About the number plates, it would be a good idea to get jdm style plates for it. This here is what I've come up with for my car,

If the power pump itself is leaking, it would be better to replace it than trying to fix the leakage or the leakage would continue to haunt you since there is quite an amount of pressure in the pump. If there's a leak between the two pieces of the case, and if you can get the casing open, then you should be able to fix it for good with some good gasket making silicone.