Since "new-old-stock" OEM batteries are rare, you should look for high-quality aftermarket replacements or compatible 24V cells:
The is a key power source for a variety of value-oriented cordless tools, most notably the Powercraft 24V Cordless Hammer Drill (Model 9144) . Often distributed by major European hardware retailers like Bauhaus and Hagebau, these batteries are favored by DIY enthusiasts for their balance of performance and affordability. powercraft 9144 24v battery new