First of all, the scope that is on it, is all that is needed. This rifle does not need a new scope just for the sake of putting on a new scope. If the wrist break is properly repaired, ie: good glue job with acraglass of equivelent, the stock will not break there again. The last stock I re-finished, cost the owner $600.00 - for the re-finish. He wanted oil and wanted it to look like as it did orginally from Browning- ie: like a plastic piano finish. A replacement 98 Mauser walnut stock might be available from someone like Brownells(used to have them)easy if you lived in the States. Sometimes difficult to get conceived 'gun parts' over the line but OK if the outfit has the US export permit. You don't need a permit to get a stock, however they'll say you do. You can buy an injection moulded synthetic stock right from the local Edmonton Al. Wholesale sports for about $125.00 to $160.00 in a Ramline. You can buy a wooden re-carved from a gun shop dealer, or maybe Boydboys and learn to finish inletting the parts and finishing yourself, for about $250.00 or maybe more.
There are options open to you. The prices I've quoted are not etched in stone. Different places have different prices.