Looking for silver hand/footprint refresher course in London/Surrey area

Hi there,
I took an online course in silver fingerprint, hand and footprint jewellery and subsequently started a business but am now realizing the limitations of having learnt online and am therefore looking for someone who could spend a couple of hours or so focusing on certain aspects that I've been struggling with (specifically soldering cufflinks and getting the best quality hand/footprint stamps from the stamp-making kit). I am on the South London/Surrey border so ideally would be looking for someone in London or Surrey.
Many thanks!
KJS