Wouldn't say not having rack mounts is that big of a deal with the support struts on a bagman, as there won't be much pressure on them, so a seatpost clamp with eyelet for this is enough. I believe carradice sells one, and there are others too. Or they can be bolted to the brake bridge like I did (there's a picture a couple of pages back). Bit of a bodge, but does the job.
Wouldn't say not having rack mounts is that big of a deal with the support struts on a bagman, as there won't be much pressure on them, so a seatpost clamp with eyelet for this is enough. I believe carradice sells one, and there are others too. Or they can be bolted to the brake bridge like I did (there's a picture a couple of pages back). Bit of a bodge, but does the job.