Locating shares to short

Hi all,
I was wondering if is it all brokers or just some are ridiculous when it comes to locating shares?
I am currently using Tradestation and I am trying to locate shares for some stocks, most of the stocks it keeps saying Unable to locate shares.
Is this with Tradestation, or are there any brokers that are easier for shorts and locating shares?

Example I was unable to locate any shares to short SRNE, HTZ, ACB, YCBD

 

We offer locates from our clearing broker and premium locates. This is the locate tool built into Lightspeed Trader for premium locates.

 

Where is premium locates located? Link please.

 

https://www.velocitycapitalllc.com/vlcy/#/

 

So I am guessing if a broker can't locate shares to locate, then all brokers same.
There's no broker better in locating. I hope I am misunderstanding something

 

IMO, having the ability to get a located from both the clearing firm and a third party is better. The locate from our clearing broker, Wedbush Securities has no fee if you do not hold overnight. If you do not get the free locate, and you sign up for the locate tool built into Lightspeed, you can then check the cost and accept or reject it. It is very popular.

 

No, Some brokers are better in refreshing their locates during the day. I think R. Morse would have better insight to variations in brokers and particularly lightspeed

 

I could give it a try.