Line gratings as masters for soft lithography

Dear labmembers,

Does anyone have 1D grating patterns available that they can lend to
us? We plan to replicate the pattern of the 1D grating master template
with PDMS and use the PDMS stamp for soft lithography, so your grating
pattern will remain intact. The grating period we are looking for is
between 250 nm and 400 nm.

Thanks,
I-Kang