For sale/wanted (Please be aware of scams) discussion

Hi everyone, I own a tickleberry sentinel but suspect it might be an imitation since I bought it from lovehoney for £40. The issue is that the ring included doesn’t suit me; I require the 50 mm size. However, I’m reluctant to spend £50 (for extreme restraints) or £70 (from tickleberry) on a chunk of shiny metal, particularly because I’ll soon be returning to student life with limited funds! Does anyone have an extra one available for sale? Or perhaps someone knows where I can find it at a reasonable cost?