Van der Westhuyzen, a late inclusion in the Springbok Rugby World Cup squad before leap-frogging the list of fullback contenders into the first-choice line-up, was initially going to play Super 12 rugby for the Bulls in 2004 before heading to Japan, but has since made an about-turn.
The 25-year-old Van der Westhuyzen would be a welcome addition to the Welford Road playing staff, with former England fullback Tim Stimpson recently having been released from his contract to join French club Perpignan, while Ireland star Geordan Murphy is still out with a broken leg, suffered in a RWC warm-up match against Scotland.
According to a report in Afrikaans daily, Beeld, Blue Bulls Company CEO Stephan Pretorius says they offered Van der Westhuyzen a Bulls Super 12 contract, but he declined the offer.
Added Pretorius: "He was also offered a Springbok contract on condition that he plays Super 12 rugby."
Meanwhile, Stefan Terblanché, the Bok wing fans love to hate, is set to join Van der Westhuyzen in the United Kingdom, with the Natal Sharks man negotiating a deal with Welsh club, the Neath-Swansea Ospreys.
Other South African provincial players linked with moves abroad, according to Beeld, include hard-running Lions winger Giscard Pieters (Rotherham), Cheetahs openside flanker Ryno van der Merwe (also Rotherham), and former Bok lock-cum-flank Marco Wentzel (NEC Harlequins).
Wentzel is expected to join up with former Bok skipper André Vos at the Stoop, but only if he passes a fitness test on his damaged ribs.