I don't have the dates but here is a list of all the kits Semroc produced before being purchased by eRockets.

Aerobee Hi KV-2 $12.99
Aerobee 150 KD-3 $30.99
Aerobee 300 KD-5 $29.99
Aphelion KV-26 $16.99
Apollo Capsule KS-2 $19.99
April Dancer KA-5 $21.99
Arcas KS-8 $25.99
Arcon KV-7 $16.99
Astro 1 KV-30 $14.99
Astro Jr KA-4 $10.99
Astrobee 350 KV-13 $13.99
Astron KA-23 $9.99
Baby Orion KA-31 $23.99
Bandit KV-81 $25.99
Batrok KV-53 $13.99
Blue Bird Zero KV-45 $26.99
CC Space Plane KCC-3 $14.99
Centurion KV-40 $24.99
Centurion-F KA-33 $35.99
Cherokee C KA-30 $18.99
Cherokee-D KV-84 $27.99
Defender KV-60 $32.99
Der V-1.5 KA-36 $13.99
Earmark KA-19 $8.99
Egg Crate KV-39 $32.99
Excalibur KV-43 $16.99
Firefly KV-31 $15.99
Goblin KV-80 $18.99
Goliath KV-28 $27.99
Hydra VII KV-29 $46.99
Iris KD-4 $17.99
ISQY Tomahawk KD-2 $12.99
Javelin KV-16 $10.99
Laser-X KV-33 $21.99
Lil Centauri KA-17 $18.99
Lil Hercules KV-14 $6.99
Lil Ivan KV-49 $14.99
Little Joe II KS-3 $26.99
Lune R-1 KV-35 $17.99
Magnum Hornet KV-69 $18.99
Magnum Sprint KV-67 $20.99
Marauder KV-32 $22.99
Mark II KV-1 $12.99
Mars Lander KV-54 $54.99
Maxi Micron KA-34 $23.99
Micron KV-8 $8.99
Midget KV-68 $12.99
Mini Aero Dart KA-21 $17.99
Mini Centurion KA-28 $17.99
Mini Hustler KA-20 $22.99
Mini Omega KA-29 $25.99
Moon Glow KV-82 $8.99
MX-774 KS-12 $27.99
Nike Tomahawk KD-7 $22.99
Nomad KV-76 $18.99
Omega KV-64 $39.99
Orion KV-41 $39.99
OSO KV-62 $22.99
Ranger KV-83 $33.99
Rawhide KV-19 $7.99
Recruiter KV-22 $19.99
Red Eye KV-72 $8.99
Rocket Rack KM-1 $8.99
Sam-3 KV-79 $19.99
Satellite Killer KV-73 $34.99
Saturn 1B
Scrambler KV-34 $33.99
Shrike KV-37 $27.99
Sky Hook KV-9 $9.99
SLS Aero Dart KV-6 $54.99
SLS Arcas KS-5 $74.99
SLS Explorer KV-56 $44.99
SLS Hustler KV-11 $69.99
SLS Lil Hustler KV-57 $45.99
Snake Jumper KA-14 $21.99
Snipe Hunter KV-51 $14.99
Space Shuttle KV-38 $29.99
Spartan KV-59 $13.99
SPEV KV-61 $30.99
Sprite KV-86 $11.99
Squire KA-3 $15.99
Starfire KV-20 $13.99
Starlight KV-21 $19.99
Starship Excalibur KV-85 $39.99
Starship Vega KV-78 $32.99
Start KA-25 $13.99
Swift KV-24 $14.99
Tau Zero KN-2 $18.99
Taurus KV-42 $31.99
Texas Firefly KV-31 $22.99
The Point KV-58 $7.99
Thunderbee KA-1 $7.99
ThunderStrike KA-16 $24.99
Trident KV-71 $44.99
Triton KV-23 $5.99
USS America KV-77 $59.99
Vector-V KV-44 $14.99
Vega KV-25 $18.99
VF-261 KA-10 $21.99
Wac Corporal KD-1 $17.99
X-21 KCC-4 $6.00
XK-23 KV-36 $15.99
Yung'uns Nuke KA-13 $21.99
Launch Missile KN-4 $18.99
Centaur KV-12 $24.99
Mini Explorer KA-22 $16.99
cc: SST Shuttle-1 KCC-1
Hydra One KA-18 $29.99
Arcon-Hi KV-15 $20.99
Hawk KV-65 $9.99
Mini Optima KA-26 $19.99
Ruskie KA-11 $21.99
Saki KA-12 $22.99
Gee'hod KA-15 $25.99