Here is the parts list supplied by Mike:
Parts list:
1ea. JDM Bistein BTS-5056J. www.hirano-tire.co.jp - Export divison; exportdivision@hotmail.com (the Company regularly advertises 128,370 Yen for the BTS 5056J Kit)
2ea. USDM SpecB top hats, 20320AG01A. local.
2ea. USDM SpecB dust cap 20320AG000. local.
2ea. JDM rear shock perch 20370AG010. www.japanparts.com
2ea. JDM rear rubber upper 20375AE011. www.japanparts.com
If I'm following this correctly,
Item #1 is the suspension kit identical to the one available from HKC.
The top hats, dust caps, shock perch and rear rubber uppers would be purchased separately. I've seen ~ $200 mentioned as the cost of those items.