Here are links to to lenovo stock original firmware For lenovo smartphone and tablets . All the following Roms are compiled in zip and contains all the flash tools required for flashing your device .
LENOVO A PLUS A1010a20(S242)[Android 5.1]
http://www.mediafire.com/file/ysqmcisgmqhdr30/Lenovo_A1010a20_S242_MT6580_20160822.zip
LENOVO A PLUS A1010A20(S253) [ANDROID 5.1]
http://www.mediafire.com/file/lon8kj5rb5bj3qh/Lenovo_A1010a20_S253_MT6580_20161207.zip
LENOVO A PLUS A1010A20 (S256)[Android 5.1]
http://www.mediafire.com/file/npa55df4n41bbb8/Lenovo_A1010a20_S256_MT6580_20170418.zip
LENOVO A60 [ANDROID 2.3.5]
http://www.mediafire.com/file/se35jl17a5875vv/Lenovo_A60_2.3.5_OTA.zip
(after flashing , extract update.zip to sd card or phone storage . flash "update.zip" via recovery, this will fix the boot image and others
LENOVO A60 PLUS (S307) [ANDROID 2.3.6]
http://www.mediafire.com/file/u7yv8clu69rh9o5/Lenovo_A60_Plus_S307_MT6575_20121220.zip
LENOVO A60 PLUS (S310) [ANDROID 2.3.6]
http://www.mediafire.com/file/1o7nob1sbty1byc/Lenovo_A60_Plus_S310_MT6575_20120823.zip
LENOVO A60 PLUS (S311) [ANDROID 2.3.6]
http://www.mediafire.com/file/4nebxb382bfz98g/Lenovo_A60_Plus_S311_MT6575_20121023.zip
LENOVO A66 [ANDROID 2.3.6]
http://www.mediafire.com/file/6x6vhkxb88gfycx/Lenovo_A66_MT6575_2.3.6.zip
LENOVO A PLUS A1010a20(S242)[Android 5.1]
http://www.mediafire.com/file/ysqmcisgmqhdr30/Lenovo_A1010a20_S242_MT6580_20160822.zip
LENOVO A PLUS A1010A20(S253) [ANDROID 5.1]
http://www.mediafire.com/file/lon8kj5rb5bj3qh/Lenovo_A1010a20_S253_MT6580_20161207.zip
LENOVO A PLUS A1010A20 (S256)[Android 5.1]
http://www.mediafire.com/file/npa55df4n41bbb8/Lenovo_A1010a20_S256_MT6580_20170418.zip
LENOVO A60 [ANDROID 2.3.5]
http://www.mediafire.com/file/se35jl17a5875vv/Lenovo_A60_2.3.5_OTA.zip
(after flashing , extract update.zip to sd card or phone storage . flash "update.zip" via recovery, this will fix the boot image and others
LENOVO A60 PLUS (S307) [ANDROID 2.3.6]
http://www.mediafire.com/file/u7yv8clu69rh9o5/Lenovo_A60_Plus_S307_MT6575_20121220.zip
LENOVO A60 PLUS (S310) [ANDROID 2.3.6]
http://www.mediafire.com/file/1o7nob1sbty1byc/Lenovo_A60_Plus_S310_MT6575_20120823.zip
LENOVO A60 PLUS (S311) [ANDROID 2.3.6]
http://www.mediafire.com/file/4nebxb382bfz98g/Lenovo_A60_Plus_S311_MT6575_20121023.zip
LENOVO A66 [ANDROID 2.3.6]
http://www.mediafire.com/file/6x6vhkxb88gfycx/Lenovo_A66_MT6575_2.3.6.zip