I'm not sure the SMC takes bouldering info / publishes any bouldering guides Chris? Certainly haven't in the past and I don't see it shown on the new routes page or the publications.
TBH, I think Scotland REALLY needs a good open source user-generated non profit making bouldering topo app. It's just not really commercially viable to produce a guide so it becomes a labour of love for the likes of John Watson etc. and I don't think he's planning another one?
I thought I posted a link to the database uploader it definitely has facility for submitting new problems
https://smc.org.uk/climbs/submissionI am not sure how opensource you want it, but the database is growing and expanding, it might include bouldering too.
https://routes.smc.org.uk/and the topoeditor someone made (for them?) is open source AFAIK, and really easy to use
https://topoeditor.com/