Hit up the boys in the Toltoys Facebook group, they'll know for certain which version of the Jawa blaster should be matched to the figure.
My interpretation of the text on that page is that the Toltoys ESB VCJ is unique due to the cape being different. The gun being taped inside the bubble is not really the unique aspect as that was common for ESB figures at the time. So it's a run-on sentence that can result in misinterpretation due to the way it is written.
There isn't a unique Toltoys Jawa blaster so don't stress about having to now track down a super rare accessory. I'm just not sure which particular mold would be the correct match.
My US one is displayed with the no bump version while my Toltoys one has the bump as that's how I received it. I obtained mine well before the detailed research on factory mold differences though.
https://www.variantvillain.com/characters/sw/jawa/
https://www.variantvillain.com/accessory-guide/jawa-blaster/
Given the Toltoys VCJ appeared on a Kader 41 back, it means the Kader blaster mold would be correct for this figure. The VV page details that the M3 mold (no bump) appeared with the 41 backs but Toltoys figures often have unusual transition mis-matches so it's possible the Toltoys VCJ might come with the M2, M3 or a mix of both. Again, the Facebook group will be the experts in this as some of them have actually owned one of the handful of carded ESB VCJ that still exist.