In order to improve on rest stability, you can always had a steel plate 1/2" thick or so..(with a wider and longer footprint) to the bottom (drill and tap) of the Hoppes rest.
If your down in the USA or have a someone you know traveling through, get a Hart cast iron rest. This rest will service most shooters well.
If you plan on shooting for some time, save up for a good rest as it will last a life time and have some resale value.......in general....Not a bad investment especially at 1.15x exchange rate from the usa.
Joe