I am looking too.
To the best of my knowledge Sanyo has not provided even a firmware update for even their own DVD-ROM for HD-Burn.
So it's just
-Sanyo CRD-BPDV2 available only in JA
-MSI DR4-A (MS-8404A) ak Sanyo CRD-BPDV2 OEM drive ak MSI DD0203 available only in AUS
-Acestek DD0203 available only in US
-Optorite DD0203 available only in US
that support HD-Burn.
Additional DVD-burner may be available as long as they use the Sanyo chipset with HD-Burn support.
Best info and link collection I know is
Sanyo introduces 1.4GB CD-R burner/DVD Burner