Though repair tenders (both Class IV Frigate and Class V Destroyer) are commonly used and quite popular, there has been work done on creating tenders that can support heavy repair bays.
POLARIS MOBILE REPAIR FACILITY (SOL IMPERIAL WORLDS)
As the Sol-Genari wars escalated with large scale conflicts between Cruisers and other capital ships, the need for a more comprehensive repair tender was needed. Rear Admiral West, the original proponent of the Klondike pushed high command for a tender that could support repair bays found on stations that worked exclusively on capital ships. Such a massive repair station would require a cruiser's superstructure to support, and even then it could not support a larger force field because of the mass requirements. The Rear Admiral found it to be invaluable however, as his fleet of Long Range Beam cruisers could fire at range, with these tenders stationed behind moons or asteroids, ready to take in any Capital ship for repairs in the field without being forced to leave the region.
FAT GENSHAI MOBILE REPAIR FACILITY (GENARI UNITED EMPIRE)
This oversized repair tender was purpose-built more as a defensive repair station that would occupy captured Sol regions after a successful Genari campaign. Very slow and unwieldy, it tends to move short distances in preparation of a Sol counterattack. Designed to repair capital ships, it also has 120 marines available to resupply ships with marine pods similar to the Destiny Troop Ships' role. Because of the size of the large repair bays and engines needed to propel a ship of this size, there was no space to give this ship proper weapons systems. As Fleet Commanders get used to this mobile repair facility, they've come to find it invaluable in important defensive operations.