la_ext location for hevc hw encoding?

Hello

I'm trying to encode with Media Server Studio 2017R2 samples with lookahead plugin, but can't find the hevc la_ext plugin to encode Hevc with hardware, i found that lookahead extended plugin for LA ENC AVC for H264 encoding, where is the la_ext plugin for LA ENC HEVC?

In Latest Media SDK show that are possible to encode HEVC HW with look ahead plugin, but can't find lookahead plugin for HEVC

HEVC encode limitations: 

Supports maximum resolution 4096x2172. 

Supports only CQP, CBR, VBR, ICQ and AVBR rate control methods, as well as MFX_RATECONTROL_LA_EXT with lookahead plugin. 

Query max macroblock per second report not supported. 

Next limitation for encoded bitstream:

o No tiles support;

o No SAO;

o No P slice;

o Progressive only.