well one of the best rally suspension available was DRUMMONDS...
website:
Drummond Motor Sport - Not all shock absorbers are created equal
sample of suspension range:: http://www.dmshocks.co.uk/products/5-way-adjustable/
coming from aussie...so shipping shouldn;t be major trouble....
i highly recommend this brand..since PERT(*karamjit rally team) was using this suspension in very long time...and so other rally competitors.....my rally car also once installed this suspension (borrow from fren to test in rally)......well....speechless....this drummonds stands on their own league.....
*quite comfort for rally use while maintaining great handling...especially in high speed...
for dealer not sure..but maybe u can try approach this MRU team and ask them to get one set for u....since they also use DMS suspension