These op-amps are not to be found here, help

Hi, friends
Here is the list of the Op-amps used in almost all of the projects by hobbyists and modern equipment. But to my surprise these are no where to be found in my country.I have tried almost every large city and dealership in my country.They offer to import them for me against heavy import charges compared to the actual prices of devices,Which is going to be my last option.
1-MCP6273=N.a
2-MCP6283.=N.a
3-MCP6022.=N.a
4-LMV358. N.a
5-MCP601. N.a
6-MCP602 N.a
7-AD8099 N.a
8-AD8055. N.a
9-AD8091. N.a
10-AD8092.N.a
11-AD8603.N.a
12-OPA350.N.a
13-TLC2277.N.a
14-AD823AR.N.a

Can any body help me with the easy to find/commonly used possible replacements,Package whether smd or through hole,its is not important,neither pin compatibility is an issue.
I need those MCPxxxx ones and ADxxxx ones or their replacements.


Secondly Any body from Pakistan if know about the place or shop having them,please respond.

Thank you very much.

Hello liteon,

do you have try to get it directly from the manufacturer of the IC's?

As a student or as an engineer of electronics you can get free samples for development of circuits from the manufacturer. You only have to open an accout.

All types with starting "MCP" are from https://www.microchip.com/, all "AD..." from https://www.analog.com/en/index.html, all others are from https://www.ti.com/.

For all firms make a login with creating an account. Normaly it will be not a problem.

Regards

Rainer

Hi, rfredel.
Thank you for the reply. Since non of the companies have their country office in my country.And i may not be able to fulfill certain per-requisites. Honestly i never tried to request free samples ,yet i tried to register with couple of manufacturers but so for no success.I will try again if i could not find these in my country.
This evening i got an e- mail from a retailer with having in stock the last two models in the above list and promised to find me some others if not all.I am waiting for him.
Thank you.

You could place a small order with one of the many mail order companies, either here in the U.K. or in the 'States, as a test to see what import duty you will pay.