The recommended Service from VAS NY Inc will get you in touch with a very skilled Technician.
For Wiring Internally my most recent experience of PC Triple C wire has been the the most impressive I have heard a Tonearm I am very familiar with and have heard progress as a design over many years. At present this wire is not available of the shelf to suit Tonearm purposes. SAEC's latest TOTR Tonearm is the only commercial product that I know has utilised the wire.
As for XLR, Atlas make OCC Connectors and these are looking lake very high quality connectors.
To get a better description on XLR Plugs the Helix Cable Thread on this forum, will cover a broader range of options, where some have been assessed and commented on.