WTB (UK/EU, maybe WW) Signetics/Philips PLS 155

[giosif]

Hello,

Anyone here who happens to have 2 x blank Signetics / Philips PLS 155 ICs they are willing to sell, please?
They can be either PLS155A (PLCC package) or PLS155N (DIP package), as long as they are blank.

I am trying to resurrect a Tektronix 2710 SA whose display board has a total of 4 PLS ICs "broken": 3 x PLS 155 + 1 x PLS 157.
I was able to source all 4 ICs from eBay at a reasonable price but, upon arrival, it turned out that 2 out of 3 PLS 155 had already been burned and I couldn't use them.

Thanks in advance!

[giosif]

Bump, in case someone happens to have found some for spare.
I tried sourcing these last two from eBay, but luck was not on my side: although the ICs came in blank, trying to program them failed. 
And it's not my programmer, as I've burned PLS 155 ICs with it in the past.