There is no commonly available digital back for a Super 8 camera like the Canon 1014 XL-S. In theory, a DIY conversion is possible, but it is a very difficult engineering project rather than a simple add-on.

The main challenge is fitting a digital sensor where the film gate was. Super 8 film is very small, so you’d need a very small sensor positioned precisely at the film plane, plus electronics for recording, power, timing, and likely major mechanical modification. Some very small sensors such as 1/3-inch video sensors are in the general size range, so a custom build might be possible, but it would be more of an experimental “hack” than a practical money-saving solution.

Realistically, building one yourself would require advanced optical, electronic, and mechanical skills, and the result is unlikely to outperform a normal digital video camera.

If your goal is the Super 8 look, the practical route is still to shoot film and have it scanned to digital for editing. If your goal is simply inexpensive digital recording, a dedicated camcorder or mirrorless camera is the better option.