Your search for "small, but equivalent to" revealed the following:

Battery-Powered Self-Propelled Miniature Train : Yoshiaki Ishikawa Pre-painted N (1:150)

Pear Rail for Mini-mini Train, Daiso Case Compatible (200x100mm) : Yoshiaki Ishikawa Railroad Tracks 9mm Gauge N (1:150)

Battery-powered Self-propelled Mini-mini train Hakone Tozan Railway Moha2 : Yoshiaki Ishikawa Finished product N(1:150)

Battery-Powered Self-Propelled Miniature Tram : Yoshiaki Ishikawa Finished product N (1:150)

Battery-Powered Self-Propelled Miniature Train : Yoshiaki Ishikawa Finished product N (1:150)

R25 oval for mini mini train, for Daiso case (145x65mm) : Gimei Ishikawa Railroad Track 9mm gauge N( 1:150)

Battery-Powered Self-Propelled Mini Mini-Train Pantograph Type: Yoshiaki Ishikawa Finished product N (1:150)

Battery-Powered Self-Propelled Mini Mini-Train Diesel Locomotive Specification Blue Kiha : Yoshiaki Ishikawa Pre-painted N (1:150)

Battery-powered Self-propelled Mini-mini train Hakone Tozan Railway Moha1 : Yoshiaki Ishikawa Finished product N(1:150)

Goggle rail for Mini-mini train, Daiso Case Compatible (200x100mm) : Yoshiaki Ishikawa Railroad Tracks 9mm gauge N (1:150)

Note:Kobaru Equivalent: Sakatsuo Unpainted Kit N(1:150) 3821

Wide L Kakukakure for Mini-mini Train, compatible with Daiso case (300x90mm) : Yoshiaki Ishikawa Railroad Tracks 9mm Gauge N (1:150)

Mini Mini Train Rail R40 (Inner Diameter 6cm, Outer Diameter 10cm) : Yoshiaki Ishikawa Railroad Track 9mm Gauge N(1:150)

Battery-Powered Self-Propelled Miniature Train : Yoshiaki Ishikawa Finished product N (1:150)

Wide L Kunekune Rail for Minimini Train, compatible with Daiso case (300x95mm) : Yoshiaki Ishikawa Railroad Tracks 9mm gauge N (1:150)

[Model] Mesh Fence Height 10mm Kobaru Equivalent: Sakatsu Kit N(1:150) 3843