In dire need, one can add one on top of a screw connector. Take a 7805 in to-220, check pinout datasheet, bend the legs of V+ and gnd and put them in screw connector of Vin and screw them tight together with the power wires. The 3rd terminal with 5v bent away, can solder a wire with a heatshrink insulation and take it where you need it. Screw terminals are nice this way.
Not very nice looking, and no caps on output, but perhaps you can do without. Or in extremis you could solder a 10uF directly on the legs. And a 1206 ceramic can find a good fit on the to-220 legs below the body.
Not very nice looking, and no caps on output, but perhaps you can do without. Or in extremis you could solder a 10uF directly on the legs. And a 1206 ceramic can find a good fit on the to-220 legs below the body.